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The North American taxa have already been split to form Northern Shrike (IOC)/Northern Grey Shrike (HBW) L.borealis which includes invictus and borealis from N.America and mollis, funereus, sibiricus and bianchii from Asia.
And of course IOC differs from HBW and Howard & Moore in recognising Great Grey Shrike L.exhubitor which includes exhubitor and homeyeri. HBW treats Southern Grey Shrike L.meridionalis (Iberia) as a monotypic species.
Grahame
Last edited by Grahame Walbridge : Friday 13th October 2017 at 09:45.
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